import java.util.Scanner;

public class Main1658 {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        double a=sc.nextDouble();
        double b=sc.nextDouble();
        if (a>=60&&b<60){
            System.out.println("green");
        }else System.out.println("red");
    }
}
